Telescopic lifting jack



Aug. ll, 1925. 1,549,152

AJ. RUEFF TELESCOPIC LIFTING JACK Filed April 25. 1923 2 Sheets-Shut 1 fm BY /V/@mm A TTORNE Y Aug. u, 1925. 1,549,152

TELESCOPIC LIFTING JACK '55 [M MW Filed April 26. 1925 2 Smets-Shut 2 im E' i 1N VENTOR i@ we 7Ld BY /f/G/ @mi A TTORNE Y Patented ug. 11, 1925.

UNITED VSTATES i FEC.

JOSE RUEFF, OF NEW YORK, N. Y.

`'llallirllsCOPIC LIFTING JACK.

Application filed April 26, 1923. VSerial No. 634,752.

prises a'lifting jack with collapsible telescopic members, that are actuated by a toggle connection, and a worm and wheel. The links of the toggle connection are axially in line when the jack supports its load, and thereby prevents any tendency of the load .lowering The worm and wheel operates the toggle connection and automatically locks it in place.

The object Aof the invention is the production of a lifting jack which can be easily operated with the members thereof rigidly sustained in position when supporting its load, and which will remain in position without special locking devices; although a lock may be provided therefor.

It is adapted to be applied to a vehicle, especially an automobile without changing the construction of the latter, and is adapted to lift and lower the vehicle with its wheels from the ground, and to lift and lower various other objects.

In the accompanying dra wings Fig. 1 represents a front view of an exempliiication of the telescopicV lifting jack in operative position; Fig. 2 shows a section of Fig. 1 on the line 2, 2; Fig.3 represents a view similar to Fig. 1, with the jack in .its collapsed position; Fig. 4 indicates a section of Fig. 2 on the line 4, 4; Fig. 5 represents a front view of a modification of the telescopic lifting jack connected to the axle casing of a vehicle; Fig. 6 shows a section of Fig. 5 on the line 6, 6; Fig. 7 indicates a side elevation of the lifting jack when collapsed and locked to its axle casing; Fig. 8 shows a bottom plan view of Fig. 7 and Fig. 9 represents a view similar to Fig. 5 with a further modification.

Referring to Figs. 1 to 4 the lifting jack comprises the bottom guide barrel 20, that has formed therewiththe longitudinal' guide slot 21 and the lug 23. c

A movable sleeve 24 is guided in the barrel' 2O and has extending therefrom the guide pin 25 and the journal pin 27. A housing 28 with the journal bearings 29 eX- tends from and is formed with the sleeve 24. A worm wheel 30 is journaled on the pin 27 and is maintained in operativeposition by means of the washer 31. A worm `shaft with the worm 36 is journaled in the bearings 29, and has formed therewith the square operating end 37. The latter is adapted to have a wrench applied thereto. The worm 36 meshes with the worm wheel 30. A pair of diametrically oppositely positioned journal pins 40 and 41 extend from the worm wheel 30. A journal pin 42 eX- ten'ds from the lug 23. A toggle link 45 connects the journal pins 40 and 42.

A movable plunger 46 is guided in the sleeve 24 and has mounted thereon the head 47 with t-he concaved upper face 48. A lug 49 is formed with the head 47 and has eX- tending therefrom the journal pin 50. A longitudinal guide groove 51 is formed in the plunger 46 and engages the guide pin 25 of the sleeve 24. A toggle link 53 connects the pins 41 and 50. rlhe barrel 20, the sleeve 24 and the plunger 46 constitute the collapsible telescopic members of the lifting jack and the toggle links and 53 with the worm wheel 30, constitute a toggle connection.

To operate the telescopic lifting jack it will be noted that Figs. 1 and 2 show it in its extended position and Fig. 3 shows the jack in its collapsed position. The object to bc raised or lowered bears on the face 48 of the head 47. To lower the head 47 from the position shown in Figs. 1 and 2, the operator applies a wrench to the square end 37 of the worm shaft 35 and turns the latter, whereby the worm wheel 30 is turned. By this means the toggle link 53 is lowered and swung into position shown in Fig. 3 and the toggle link 45 is swung to the position shown in said figure. The toggle link 53 pulls down the head 47 with its plunger 46 and at the same time the sleeve 24 is lowered, all with the coaction of the toggle link 45. Thereby both the plunger 46 and the sleeve 24 enter the barrel 20, the plunger 46 moving faster than the sleeve 24. The engagement of the worm 36 with the worm wheel 30, at all times locks the movable elements in position, and avoids any danger whatever of the head 47 with its load being inadvertently lowered by accident. It is to worm 76 andthe square end 77. kAnfupper; sleeve 80 withthehead' 81,:the longitudinal.

movable sleeve 65 encircles the post 60 and has formed therewith at its lower endthe housing 66 withn the journal bearings 67 Aguide pin' 68' extends from the sleeve 65 and engages the guide groove 61. A journal pin 70extends from the sleeve 65. j A. worm lwheel`171 with the opening 72 in its webA is.-

journaled on the pin 70 and has extendingl therefrom the `journal pins 7 3' and 74. A worm shaft 75 is journaled in the journal bearings67 and has ormedtherewitli the slot 82, and. the Yflange'82a having an opening that can register with the opening 72 ofv the worm wheel 71 encircles the sleeve 65'. rvThe l has) of a lock 82b can engage the said l C t) opening 72 and the opening-'in the flange 82a. The sleeve 80 has formed therewith a pair of side journal`brackets 83 that are hinged tothe axle casing 84, by means of the pins 85. A Ulshaped bracket 86,with`` the boss 87 extends from the sleeve 80, and. supports the j ournal' pin 88. VAtoggle link 89 connects the journal pins 74 and 88 and a toggle link 90 connects the journal pins 63 and 73. A latch 94 is pinned to the axle sleeve 84, by means of the -pin 95 and can lockr witha hook 9,6 extending from the sleeve 80, to lock'the telescopic lifting jack in operative position. A spring 97 has one end' Jfastened to the axle sleeve 84 and-its otherv end bears against the latch 94. A plate spring 99 extends from the Yaxle 'casing'. 84 to bear against the sleeve 8O to prevent jar when it isl kswung up under said axle casi-ng. A second' latch 100 1s l'nnged on a pin 101 extending4 84. In Fig. 9, kthe telescopic liftingy 'ack is.,`

represented with` its upper sleeve 80",` aving a.. flange S-thatisfast'ened to the axle sleeve 84, by means of the screws 109. rlhe sleeve 80a has extending. therefrom the U'-sh`aped` bracket ".86 with the boss 87 In this modification the` bottom post 60, the foot 62, the journal pin 63, vthe housing 66', bearings 67, journal pin 70, `journal pins 73, 74,wor1n shaft 75, worm 7 6 and toggle links 89 and 9() are constructed as already 1 explained. The worm wheel 71a in `this modification is indicated withoutthe opening72, although it may be provided with `the same.A Y

Various modifications maybelmade in the invention and the present exemplificationV is to be taken as illustrative and not limitative thereof'.

`l-l'vaving described l desire to secure by Letters Patent and claim is: l

In a lifting jack thecombination of a bottom guide barrel, a slidable sleeve guided in the barrel, a slidable plunger guided in the sleeve, aworm wheel adapted uto turn jour naled to said sleeve, a wonm adapted to turn Vj ournaled to the sleeve and meshing with said worinwheel, a toggle link with one 4end pinned tosaid worm wheel and its otherend connected to'saidbarrel and a second toggley link with one end pinned to said worm wheel and its other' end connectedto saidplunger.

Signed at the borough yof Manhattan, city of New York, in the county of New York AprilA. D. 1923. Y f j i Josnnnnrn.

my'v invention 'i 'what I and-State of New Yorlnthis 20th day of 

